//  接口：是一种能力，一种约束而已
(function () {
    //输出名字
    function showFullName(person) {
        return person.firstName + '___' + person.lastName;
    }
    var person = {
        firstName: "杨",
        lastName: "小浩"
    };
    console.log(showFullName(person));
})();
